Home / 28,780.96-39,702.52-19,812.95

Finding the Fourth Proportional to 28,780.96, 39,702.52 and 19,812.95

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Solution

The fourth proportional to 28,780.96, 39,702.52 and 19,812.95 is: 27,331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.96 : 39,702.52 = 19,812.95 : x
  2. Step 2: Convert to fraction form
    28,780.96/39,702.52 = 19,812.95/x
  3. Step 3: Cross multiply
    28,780.96x = 39,702.52 × 19,812.95
  4. Step 4: Simplify right side
    28,780.96x = 786,623,845.12
  5. Step 5: Solve for x
    x = 786,623,845.12/28,780.96
  6. Step 6: Final answer
    x = 27,331.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.